Ubuntu.comUB:CVE-2021-46966CVE-2021-46966
In the Linux kernel, the following vulnerability has been resolved: ACPI:
custom_method: fix potential use-after-free issue In cm_write(), buf is
always freed when reaching the end of the function. If the requested count
is less than table.length, the allocated buffer will be freed but
subsequent calls to cm_write() will still try to access it. Remove the
unconditional kfree(buf) at the end of the function and set the buf to NULL
in the -EINVAL error path to match the rest of function.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < 5.4.0-77.86 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | < 4.4.0-253.287 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1051.53 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1130.136 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1168.183 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws-hwe | < 4.15.0-1109.116~16.04.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1051.53 | UNKNOWN |
References
git.kernel.org/linus/e483bb9a991bdae29a0caa4b3a6d002c968f94aa (5.13-rc1)
git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394
git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203
git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b
git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be
git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23
git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17
git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234
git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa
git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b
launchpad.net/bugs/cve/CVE-2021-46966
nvd.nist.gov/vuln/detail/CVE-2021-46966
security-tracker.debian.org/tracker/CVE-2021-46966
ubuntu.com/security/notices/USN-6739-1
www.cve.org/CVERecord?id=CVE-2021-46966
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